geometry-pre-college - Math Forum
A discussion group accessible as a Web-based discussion, a mailing list, or a Usenet newsgroup, for discussions concerning school geometry curricula, teaching geometry, new software and texts, problems for students, and supplementary materials such as
...more>>

geometry-puzzles - Math Forum
A discussion group accessible as a Web-based discussion, a mailing list, or a Usenet newsgroup, for interesting problems and conundrums that require only a knowledge of elementary geometry, and discussions of solutions. Read and search archived messages;
...more>>

geometrywiz - Teresa Ryan
Blog subtitled "learning about learning and teaching mathematics." Posts, which date back to November, 2013, have included "Reflecting on Learning Objectives," "Reflections and Inquiry," "What Started as Tough, Becomes Good," "Refresh, Reflect, and Reinvent,"
...more>>

George Washington School Copy Book - Library of Congress
Scans of a school copy book handwritten by the future first U.S. President in 1745, when 14 or 15 years old. Together with a second book, these reveal geometrical definitions and problems, surveying, mensuration, multiplication and division, simple interest,
...more>>

Gerry Stahl's Website - Gerry Stahl
Publications, teaching, research, and more by the author of Constructing Dynamic Triangles Together, Group Cognition, and Translating Euclid, among others. The founding Executive Editor of the International Journal of CSCL (ijCSCL), Stahl has researched
...more>>

Getsmarter.org - Council on Competitiveness
A free web site designed to help improve math and science education. Interactive quizzes, games, and tutorials allow students to learn more about specific topics and improve their skills. MSTV, a series of interactive modules, shows how math and science
...more>>

The Golden Ratio - Andi, Mel, and Shuj
An introduction to the golden ratio, also known as phi: its connection to the Fibonacci sequence, related constructions (star, line segment, rectangle, and spiral), and connections to biology, history, and aesthetics. Site also includes a glossary and
...more>>

Graphing Calculator - Pacific Tech
Graphing Calculator is a tool for quickly visualizing math: type an equation and it is drawn for you without complicated dialog boxes or commands. Graphing Calculator 2.2, a commercial release, features symbolic and numeric methods for visualizing two
...more>>

Great Math Programs - Xah Lee
A listing about 40 excellent recreational math programs for Macintosh that do: polyhedra and Rubic cubes, curves and surfaces, fractals and L-systems, tilings and symmetry, game of hex and game of life, chess and five-in-a-row, peg solitare and polyominos,
...more>>

The Grey Labyrinth - Kevin Lin
A collection of mind-benders in math and logic. When a solution to one puzzle is posted, another solution-less puzzle is added. With an archive of past puzzles, links to other puzzle-related sites, and a bibliography of works that inspired this site.
...more>>

Growth Creature Lab - Mike Riedy
This lab ties the growth of creatures into the Fundamental Theorem of Similarity and extends it to logistic growth. The lab shows students how to collect data from the growing creatures and how the data apply to geometry. Sections of the lesson include:
...more>>

handsonmath.com - Charles Gronberg
Hands-on geometry model building materials to purchase, tested and test marketed by the American Association for the Advancement of Science in the late 1990s with the intention of targeting at-risk middle-school students (minorities and girls). The
...more>>

Harry O'Malley
Blog by a math teacher who believes "... that learning to use mathematics changes people's lives in profound and valuable ways," and describes himself as "obsessed with making that happen for people. I am convinced that recent advancements in technology
...more>>